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A novel Hausdorff fractional grey Bernoulli model and its Application in forecasting electronic waste
Waste Management Bulletin Pub Date : 2025-02-08 DOI: 10.1016/j.wmb.2025.02.002
Gazi Murat Duman, Elif Kongar
{"title":"A novel Hausdorff fractional grey Bernoulli model and its Application in forecasting electronic waste","authors":"Gazi Murat Duman,&nbsp;Elif Kongar","doi":"10.1016/j.wmb.2025.02.002","DOIUrl":"10.1016/j.wmb.2025.02.002","url":null,"abstract":"<div><div>This study presents the Hausdorff fractional NGBM (r,1), a novel prediction approach developed based on the original nonlinear grey Bernoulli model; NGBM(1,1). The approach integrates the Hausdorff fractional accumulation operator and provides greater degrees of freedom. The recurrence relation of the binomial in the discrete solution also provides simpler computation due to the elimination of the Gamma function calculation. The Jaya Algorithm is introduced to optimize the parameters of the new model to improve its adaptability. The proposed model and its findings are delineated with the help of two case studies utilizing e-waste data from United Kingdom and State of Connecticut. The proposed model is benchmarked with several existing forecasting models and the calculated Mean Absolute Percentage (MAPE) is compared. The findings demonstrate that the proposed model exhibits superior fitting and predictive accuracy in comparison to the existing models. It produced lower MAPE than its counterparts.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 349-358"},"PeriodicalIF":0.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Eco-innovative approaches for recycling non-polyester/cotton blended textiles
Waste Management Bulletin Pub Date : 2025-02-04 DOI: 10.1016/j.wmb.2025.02.001
Chandra Manivannan Arun , Logeshwaran Panneerselvan , Gunasekhar Nachimuthu , Meredith Conaty , Thava Palanisami
{"title":"Eco-innovative approaches for recycling non-polyester/cotton blended textiles","authors":"Chandra Manivannan Arun ,&nbsp;Logeshwaran Panneerselvan ,&nbsp;Gunasekhar Nachimuthu ,&nbsp;Meredith Conaty ,&nbsp;Thava Palanisami","doi":"10.1016/j.wmb.2025.02.001","DOIUrl":"10.1016/j.wmb.2025.02.001","url":null,"abstract":"<div><div>Blended textile waste constitutes a substantial portion of the global textile waste stream, making recycling essential for minimizing the industry’s environmental impact. Although polyester/cotton recycling is well developed, many other blended textiles are routinely landfilled owing to a lack of effective recycling technologies. This review critically assesses existing strategies for recycling non-polyester/cotton blends, highlighting the key challenges and opportunities for innovation. In the sorting stage, integrating artificial intelligence (AI) and machine learning (ML) enhances efficiency and accuracy. Advanced methods, such as green chemistry, mechanical recycling, and enzymatic treatments, have proven effective for most blended textiles; however, fibers, such as polypropylene, still lack defined closed-loop recycling routes. Life cycle assessment (LCA) indicates that recycling textile waste can reduce environmental impacts by 60%, but the absence of comprehensive LCA studies on diverse recycling approaches limits reliability. Furthermore, while textile recycling is sustainable, concerns regarding the emission of hazardous additives and organic pollutants pose ecological and health risks. Therefore, advanced recycling technologies for non-polyester/cotton blends are crucial for achieving sustainability. Future research should focus on developing efficient recycling methods for complex blends, addressing the environmental impact of hazardous substances, and standardizing LCA methodologies to ensure economic and environmental viability.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 255-270"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Policy and regulatory perspectives of waste battery management and recycling: A review and future research agendas
Waste Management Bulletin Pub Date : 2025-02-02 DOI: 10.1016/j.wmb.2025.01.011
Md Tasbirul Islam , Amjad Ali , Sikandar Abdul Qadir , Muhammad Shahid
{"title":"Policy and regulatory perspectives of waste battery management and recycling: A review and future research agendas","authors":"Md Tasbirul Islam ,&nbsp;Amjad Ali ,&nbsp;Sikandar Abdul Qadir ,&nbsp;Muhammad Shahid","doi":"10.1016/j.wmb.2025.01.011","DOIUrl":"10.1016/j.wmb.2025.01.011","url":null,"abstract":"<div><div>Waste batteries represent a critical waste stream due to their valuable materials and potential environmental hazards. Existing studies predominantly focus on recycling methods, technologies, and material recovery, often relegating policy and regulatory considerations to secondary or partial analyses. Notably, no comprehensive review exclusively addressing the policy and regulatory dimensions of waste battery management has been conducted. To fill this gap, this study systematically reviewed 135 original research articles using a systematic literature review (SLR) and content analysis, examining ten key aspects: (1) scope and definition, (2) collection systems, (3) recycling and processing standards, (4) producer responsibility, (5) public awareness and education, (6) regulatory framework, (7) incentives for recycling, (8) research and development, (9) data collection and reporting, and (10) partnership and stakeholder engagement. The findings highlight core policy elements essential for effective waste battery management, including multi-stakeholder collaboration, data-driven decision-making models, eco-friendly technology R&amp;D, government oversight of informal recycling, lifecycle thinking, consumer participation through education campaigns, adoption of global best practices, and Extended Producer Responsibility (EPR) implementation. Additionally, the study proposes actionable policy statements tailored for countries lacking established waste battery policies. This research provides a foundational framework for policymakers and valuable insights for researchers in waste management, environmental policy, and public administration.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 301-331"},"PeriodicalIF":0.0,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and application of iron nanoparticles from scrap metal for triclosan degradation in water via Fenton and Sono-Fenton oxidation
Waste Management Bulletin Pub Date : 2025-02-01 DOI: 10.1016/j.wmb.2025.01.012
S. Bhaskar , K.V. Apoorva , Shabina Ashraf , T. Athul Devan
{"title":"Synthesis and application of iron nanoparticles from scrap metal for triclosan degradation in water via Fenton and Sono-Fenton oxidation","authors":"S. Bhaskar ,&nbsp;K.V. Apoorva ,&nbsp;Shabina Ashraf ,&nbsp;T. Athul Devan","doi":"10.1016/j.wmb.2025.01.012","DOIUrl":"10.1016/j.wmb.2025.01.012","url":null,"abstract":"<div><div>Triclosan, a widely used antimicrobial agent in water known for its adverse effects was treated with Fenton and Sono Fenton oxidation. This study investigates the extraction of iron from scrap metal utilising acid digestion techniques and explores the production of iron nanoparticles for use as catalysts in Fenton and Sono-Fenton oxidation processes to degrade. Iron nanoparticles (FeSNPs) were synthesised using <em>Mangifera indica</em> plant extracts and characterized using scanning electron microscopy, X-ray diffraction, and electron diffusion spectroscopic spectrophotometry. Fenton and Sono-Fenton oxidation experiments were conducted with varying ratios of H<sub>2</sub>O<sub>2</sub> to FeSNPs, and the maximum removal of triclosan was 59 % and 73 % for Fenton and Sono-Fenton oxidation, respectively, with rate constants of 0.0067 min<sup>−1</sup> and 0.0210 min<sup>−1</sup>. The oxidation–reduction potential and pH played crucial roles in the efficiency of the oxidation processes. The total iron leached from the nanoparticles was 74.0 mg/L and 186.7 mg/L for Fenton and Sono-Fenton oxidation, respectively. At pH 3, the most effective ratio for triclosan removal by conventional Fenton oxidation was 1:4, whereas for Sono-Fenton oxidation it was 1:5. Sono-Fenton oxidation enhanced the production of hydroxyl radicals, resulting in a 14 % higher removal efficiency and a shorter treatment time compared to classical Fenton oxidation. Catalyst reusability studies demonstrated that Sono-Fenton oxidation maintained higher efficiency levels throughout multiple reuse cycles compared to Fenton oxidation. The results indicate the potential of utilizing iron nanoparticles derived from scrap metal as effective catalysts for the degradation of triclosan in water treatment applications. To recommend the most efficient Fenton oxidation method at an industrial scale, the study should be extended to evaluate the potential of these nanoparticles in both photo-Fenton and dark Fenton oxidation processes.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 293-300"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143273105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards fiscal sustainable practices in Mexico: The quality of municipal tax regulation and tiered tariffs improve income from solid waste management services
Waste Management Bulletin Pub Date : 2025-02-01 DOI: 10.1016/j.wmb.2025.01.009
Sergio López-Olvera , Juan Carlos Olivo-Escudero , Mauricio Hernández-Marroquín , Fausto Rafael López-Olvera , Yessica Lourdes Vallejo-Rivera , Marco Antonio Rodríguez-Gómez , Pedro Hipólito Rodríguez-Herrero
{"title":"Towards fiscal sustainable practices in Mexico: The quality of municipal tax regulation and tiered tariffs improve income from solid waste management services","authors":"Sergio López-Olvera ,&nbsp;Juan Carlos Olivo-Escudero ,&nbsp;Mauricio Hernández-Marroquín ,&nbsp;Fausto Rafael López-Olvera ,&nbsp;Yessica Lourdes Vallejo-Rivera ,&nbsp;Marco Antonio Rodríguez-Gómez ,&nbsp;Pedro Hipólito Rodríguez-Herrero","doi":"10.1016/j.wmb.2025.01.009","DOIUrl":"10.1016/j.wmb.2025.01.009","url":null,"abstract":"<div><div>Solid waste management (SWM) is a fundamental responsibility of local governments, essential for public health and environmental sustainability. Globally, fiscal practices, such as tax regulation and tariff structures, are critical for ensuring effective SWM services and achieving sustainable development goals. In Mexico, municipalities face financial constraints and heavily depend on subsidies rather than robust fiscal frameworks to fund SWM operations. This study analyzed the impact of municipal tax regulation and sustainable taxation practices—specifically differentiated and progressive tariffs—on the income generation capacity of 240 Mexican municipalities. Data from municipal financial reports was extracted from official government websites and analyzed using statistical methods in R, including variance analysis and t-tests. The results demonstrate that municipalities with higher levels of tax regulation achieve significantly greater per capita income from SWM services compared to those with minimal or no regulation. Differentiated tariffs based on socioeconomic status were found to be particularly effective, generating income levels 3.29 times higher than uniform tariffs. In contrast, progressive tariffs based on waste quantity did not significantly enhance revenue generation. These findings challenge assumptions about the universal applicability of progressive tariffs and underscore the importance of tailoring fiscal strategies to local economic and social contexts. This study highlights the need for robust tax regulation and strategic fiscal policies to strengthen municipal revenue streams and improve SWM service delivery. It provides valuable information about the impact of tax regulation quality and sustainable fiscal practices on municipal income generation, offering insights for policymakers aiming to achieve fiscal sustainability and equitable access to SWM services.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 243-254"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Landfill site selection in hilly terrains: An integrated RS-GIS approach with AHP and VIKOR
Waste Management Bulletin Pub Date : 2025-01-31 DOI: 10.1016/j.wmb.2025.01.010
Shobhit Chaturvedi , Naimish Bhatt , Vatsal Shah , Keval H. Jodhani , Dhruvesh Patel , Sudhir Kumar Singh
{"title":"Landfill site selection in hilly terrains: An integrated RS-GIS approach with AHP and VIKOR","authors":"Shobhit Chaturvedi ,&nbsp;Naimish Bhatt ,&nbsp;Vatsal Shah ,&nbsp;Keval H. Jodhani ,&nbsp;Dhruvesh Patel ,&nbsp;Sudhir Kumar Singh","doi":"10.1016/j.wmb.2025.01.010","DOIUrl":"10.1016/j.wmb.2025.01.010","url":null,"abstract":"<div><div>This paper presents a novel integrated Geographic Information System-Multi-Criteria Decision Making (GIS-MCDM) framework for evaluating landfill site suitability in Shimla, India, a rapidly urbanizing hill station. Combining Remote Sensing-Geographic Information Systems (RS-GIS) with the Analytical Hierarchy Process (AHP) and VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) methods, the framework developed a Landfill Suitability Zoning map and ranked potential sites. The Land Suitability Index (LSI), derived using AHP, categorized the 124 sq. km study area into five suitability classes, with key factors influencing rankings: Landslide Proximity (weight: 0.162), Ground Slope (0.138), Land Use and Cover (0.122), Ground Elevation (0.114), and Road Proximity (0.095). From the Very High suitability zones, eight candidate sites were identified and ranked using VIKOR, with Kiargiri (score: 0.083) identified as the most suitable, followed by Baboloo (0.530), Karog (0.535), and Phayal Road (0.663). Sensitivity Analysis (SA) was conducted across five scenarios to account for possible variations in expert judgment, with the first three increasing beneficial weights (10 %, 15 %, and 20 %) and the last two decreasing beneficial weights (15 % and 20 %), proportionally adjusting non-beneficial weights. The SA confirmed the consistency and robustness of the rankings, with Kiargiri (0.083), Baboloo (0.530), Karog (0.535), and Phayal Road (0.663) maintaining top positions despite varying weight configurations. This approach offers a reliable, adaptable framework for landfill site selection in hilly urban areas, supporting waste management, sustainable development and environmental conservation.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 332-348"},"PeriodicalIF":0.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A review on the operational parameters and degradation kinetics used in anaerobic co-digestion of tannery residues
Waste Management Bulletin Pub Date : 2025-01-27 DOI: 10.1016/j.wmb.2025.01.006
Shilpy Rani Basak, Samin Azhan Chowdhury, Rafiuzzaman Khan, Ahmad Hasan Nury, Md. Jahir Bin Alam, Md. Imran Kabir
{"title":"A review on the operational parameters and degradation kinetics used in anaerobic co-digestion of tannery residues","authors":"Shilpy Rani Basak,&nbsp;Samin Azhan Chowdhury,&nbsp;Rafiuzzaman Khan,&nbsp;Ahmad Hasan Nury,&nbsp;Md. Jahir Bin Alam,&nbsp;Md. Imran Kabir","doi":"10.1016/j.wmb.2025.01.006","DOIUrl":"10.1016/j.wmb.2025.01.006","url":null,"abstract":"<div><div>Tannery residues possess the potential to produce biogas through anaerobic co-digestion processes. Research related to anaerobic co-digestion of food wastes and easily biodegradable wastes is ongoing and a vast advancement has been observed already to reclaim biogas as recycled energy. However, a review on the co-digestion of tannery residues and their potentiality to produce recycled energy has been initiated very limitedly. As these residues are more persistent compared to the biodegradable ones, their conversion to a simpler and safer form is highly required. To fill in this gap, an approach to review the co-digestion of tannery residues and its potential degradation kinetics has been initiated here so that the prime co-digestion- and kinetic- parameters are evaluated. Moreover, four generic equations with 45 parameters (variable and constant) have been developed based on the existing literature to explain the bacterial growth with substrate- and product- inhibition as well as substrate degradation. This review outcome will lead to the biochemical modelling of the degradation of tannery residues for various co-digestion elements. It will lead the modelers to find not only the potential parameters to be considered during co-digestion but also the effective initiations of related experiments.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 271-292"},"PeriodicalIF":0.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143273104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Waste floral foam to nanoporous activated carbon for efficient CO2 capture: An investigation on the property-performance correlation of KOH impregnation
Waste Management Bulletin Pub Date : 2025-01-25 DOI: 10.1016/j.wmb.2025.01.007
Akshata Pattanshetti , Vidhya Jadhav , Amruta Koli , Miroslaw Kwiatkowski , Radha Kishan Motkuri , Deok-kee Kim , Sandip Sabale
{"title":"Waste floral foam to nanoporous activated carbon for efficient CO2 capture: An investigation on the property-performance correlation of KOH impregnation","authors":"Akshata Pattanshetti ,&nbsp;Vidhya Jadhav ,&nbsp;Amruta Koli ,&nbsp;Miroslaw Kwiatkowski ,&nbsp;Radha Kishan Motkuri ,&nbsp;Deok-kee Kim ,&nbsp;Sandip Sabale","doi":"10.1016/j.wmb.2025.01.007","DOIUrl":"10.1016/j.wmb.2025.01.007","url":null,"abstract":"<div><div>The efficient CO<sub>2</sub> capture requires engineering a low-cost, highly efficient adsorbent. Herein, the upcycling of waste floral foam into chemically activated nanoporous carbon (CANC) is reported. The implications of the impregnation ratio of KOH on the porosity, surface functionality of CANC, and its role in CO<sub>2</sub> capture are examined and discussed. The optimized sample, CANC-2 (SSA 1043 m<sup>2</sup>/g), with a large ultra-micropore volume and higher oxygen and nitrogen content, demonstrates 3.71 mmol/g CO<sub>2</sub> capture capacity at 15 ℃ and 1 atm. The framework provided here offers a technique for tuning the attributes of nanoporous carbon favorable for CO<sub>2</sub> capture. Ultimately, the pollution control of solid polymeric waste can be done by upcycling it into value-added products which further utilized in environmental applications.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 234-242"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting the compressive strength of rubberized concrete incorporating brick powder based on MLP and RBF neural networks
Waste Management Bulletin Pub Date : 2025-01-24 DOI: 10.1016/j.wmb.2025.01.008
David Sinkhonde , Destine Mashava , Tajebe Bezabih , Derrick Mirindi
{"title":"Predicting the compressive strength of rubberized concrete incorporating brick powder based on MLP and RBF neural networks","authors":"David Sinkhonde ,&nbsp;Destine Mashava ,&nbsp;Tajebe Bezabih ,&nbsp;Derrick Mirindi","doi":"10.1016/j.wmb.2025.01.008","DOIUrl":"10.1016/j.wmb.2025.01.008","url":null,"abstract":"<div><div>The investigations on the performance of concrete incorporating waste materials hold promise in achieving sustainable construction. Although various studies have addressed the mechanical behaviour of concrete containing waste tyre rubber (WTR) and clay brick powder (CBP), an advanced understanding of predicting the compressive strength of such concrete remains underdeveloped. In this study, predicting the compressive strength of rubberized concrete incorporating CBP using the artificial neural network (ANN)-based models is proposed for the first time. The prediction is based on multilayer perceptron (MLP) and radial basis function (RBF) neural networks. It is shown that MLP is superior in predicting the compressive strength of rubberized concrete incorporating CBP compared with RBF. However, regardless of the algorithm used, the R<sup>2</sup> and adjusted R<sup>2</sup> values are higher than 0.75. Results on Pearson’s r values greater than 0.85 illustrate higher predictive abilities of the neural networks. Moreover, the study demonstrates that it is not possible to obtain significant relationships between the individual independent variables of rubberized concrete incorporating CBP and concrete compressive strength. The ANN-based models in this research contribute towards an understanding of predicting the compressive strength of rubberized concrete incorporating CBP, which can inspire further modeling studies involving such materials.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 219-233"},"PeriodicalIF":0.0,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanistic impact of sodium nitrate on the characteristics of MWCNTS oxidation and potential application on methylene blue adsorption from wastewater
Waste Management Bulletin Pub Date : 2025-01-23 DOI: 10.1016/j.wmb.2025.01.005
Parul Dwivedi , Ashwani Kumar Rathore , Deepak Srivastava , R.P. Vijayakumar
{"title":"Mechanistic impact of sodium nitrate on the characteristics of MWCNTS oxidation and potential application on methylene blue adsorption from wastewater","authors":"Parul Dwivedi ,&nbsp;Ashwani Kumar Rathore ,&nbsp;Deepak Srivastava ,&nbsp;R.P. Vijayakumar","doi":"10.1016/j.wmb.2025.01.005","DOIUrl":"10.1016/j.wmb.2025.01.005","url":null,"abstract":"<div><div>Effect of oxidizing agents on plastic waste derived multi-walled carbon nanotubes (MWCNTs) was investigated in this study. It was investigated whether a single oxidizing agent is sufficient for the desired oxidation or if the use of multiple agents is required. Typically, the modified Hummers method employs several oxidizing agents such as H<sub>2</sub>SO<sub>4</sub>, NaNO<sub>3</sub>, H<sub>2</sub>O<sub>2</sub>, and KMnO<sub>4</sub>, contributing to increased production costs and posing challenges for scalability. The investigation focused on the presence or absence of NaNO<sub>3</sub> while altering the ratio of KMnO<sub>4</sub> and reaction time. The synthesized materials were analysed using UV–VIS spectrophotometry and FTIR. The shifted peaks of the XRD pattern were analysed for the surface modification of the MWCNTOs surfaces with the degree of oxidation. Surface morphology of the samples was obtained using FESEM and found comparable changes with the degree of oxidation. The percentage of Methylene Blue (MB) dye removal was examined using oxidized samples, and the impact of oxidation on the efficacy of dye adsorption was investigated. The results showed that maximum 79% removal occurred for lowest oxidised MWCNTs compared to others as maximum oxidation leads to agglomeration of particles. The Freundlich isotherm and pseudo 1st order reaction order models exhibited optimal compatibility with pristine MWCNTs. In contrast, Langmuir and pseudo 2nd order kinetics models demonstrated superior fitment with oxidized MWCNTs. This suggests a transition in the adsorption phenomenon from physisorption to chemisorption.</div></div>","PeriodicalId":101276,"journal":{"name":"Waste Management Bulletin","volume":"3 1","pages":"Pages 207-218"},"PeriodicalIF":0.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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